Expansible tool for honing cylinders



April 13 1926.

H. STRAND EXPANSIBLE TOOL FOR HONING CYLINDERS Filed Oct. 5, 192 2 Sheets-Sheet M W 4d. I 1 .m \1 ll I 1 I W. 4 i I I W m r I F W Z m 1r 1 l M Il 111 a w IN VEN TOR.

' A TTORNEY.

April 13 1926.

H STRAND EXPANSIBLE TOOL FOR HONING CYLINDERS Filed Oct. 5, 1924 2 h ets-Sheet 2 W 7 M n m V Willi/III),

INVENTOR. A

- ATTORNEY.

Patented Apr. 13, 1926.-

UNITED STATES PATENT, OFFICE.

HENRY STRAND, OF CLEVELAND, OHIO.

nxransmrn 'rooL son Bonnie CYLINDERS.

Application filed October 3,1924. Serial No. 741,513.

To all whom it may concern:

Be it known that I, HENRY STRAND, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Expansible Tools for Honing Cylinders, of wh1ch the following is a specification.

This invention relates to improvements in expansible tools for honing cylinders of automobile engines and the like, having for an object the provision of means whereby uniform honing of aset ofsuch cylmders may be accomplished. 0

Another object is to provide a tool of this character with a gageby means of which the expansible honing stones may be accurately adjusted, and locked at any point of cones which may be adjusted and-locked at any desired point. Y Y

Other objects will be in part obvlous and in part pointed out hereinafter.

In order that the invention and its mode of operation may be readily understood by persons skilled in the art, I have in the accompanying illustrative drawings, and in the following detailed description based thereon set out one possible embodiment of the same.

Figure 1 is a side elevation, of a hone constructed in accordance with my invention;

Figure 2 is a similar view, one of the hone segments being moved; I

Figure 3 is a vertical longitudinal section of the expansion device, certain portions being shown in elevation;

Figure 4 is a detail elevation of the expansion cones;

Figure 5 is a central vertical longitudinal section of one of the. honing segments or stones, and

Figure 6 is a sectional view taken substantially on the line 66 of Figure 3.

Having more articular reference to the drawings throng out which similar characters of reference designate similar parts,

this improved expansible tool for honing cylinders may be stated as comprising a spindle 10, one end of which is threaded and designed to be detachably connected to a universal joint, (not shown) through which operation of the cone is efiected by means of a motor or the like power plant. Pinned or otherwise fastened to the opposite. end of the spindle 10 is a spider 11 which consists of a disc-like body 12'integrally carrying a set of radiating fingers 13fth' function of which will be hereinafter apparent. Ar-

ranged between this spider 11 and the.

threaded portion of the spindle 10 is a second spider 14 which is free to move longitudinally as is clear in Figure 3 of the accompanying drawings.

This spider 14 includes a set of radiating fingers 15 and an outwardly longitudinally extended neck 16, this neck and the body portion of the spider having a. central opening 17 within which is slidably arranged a sleeve 18 carried by the expansion cones.

.Relative rotation of this sleeve and spider 14 is prevented through the provision of a "key 19 which is carried by the spider and slides in a groove 20 formed in the sleeve 18.

The fingers 13 and 15 carried by the aforementioned spiders are designed to mount the honing segments or stones and permit radial expansion thereof when an expansion member arranged upon the spindle 10 is longitudinally adjusted with respect to the other elements.

As shown in Figures 3 and 4 the sleeve 18 is externally threaded adjacent its outer end and is designed to threadedly engage a collar 21 which forms one portion of a gage by means of which accurate adjustment of the hone is attainable. This collar 21 is provided with a finger piecel22 which may be knurled and the neck portion provided with graduations designed for co-action with a pointer or arrow (not shown) carried by the neck 16 of the slidable spider 14. In the drawings the arrangement of the graduations and arrow is shown in the reverse relation to that just set forth.

The sleeve 18 as previously stated is integrally formed with the expansion member, said member including a pair of spaced cones 23 which are inter-connected by an elongated neck portion 24. As shown in Figures 2, 3, and 5 these cones are inclined in the same relative direction and are simultaneously adjustable with rotation of an adjusting nut 25 arranged upon the threaded end of the spindle 10. The relative positioning of these expansion cones with'respect to the honing segments or stones is shown in Figure 2. It is obvious that rotation of the adjusting nut 25 will move the elongated sleeve 26 longitudinally within the externally threaded sleeve 18 with the result that the cones 23 will be moved to expand the stones. In Figure 3 there is shown a coil expansion spring 27 which engages the innerend of the elongated sleeve 26 and the inner end wall of the externally threaded sleeve 18. A short ring 28 is arranged between theadjusting nut 25 and the elongated sleeve 26 so as to reduceto a minimum any tendency of said sleeve 26 to rotate during adjustment of the tool. A lock nut 29 is arranged behind the adjusting nut 25 for obvious reasons.

- Each honing segment as shown in Figures 1, 2, and 5 consists of a body portion or holder 30 whose inner longitudinal surfaces are inclined to correspond with the inclination of the surfaces of the cones 23 so as .to permit uniform radial adjustment over the entire len th. The outer end 31 of each holder 30 is provided with a circular opening for the reception of one of. the fingers 13 carried by the spider 11 which is pinned to the spindle 10.

The outer face of the holder is channeled to receive a block of carborundum or the like material, said channel opening throu h the other end of the holder 30. In or er to prevent dis lacement of the block of carborundum I etachably secure to the open end of the holder 30a bracket 32 which consists of a body portion having a circular opening 33 therethrough and a pair of oppositely directed apertured wings 34. These wings 34 are designed for alinement with threaded openings (not shown), formed in the end of the holder 30 and designed for the reception of screw fasteners 35. It is the segments to the desired diameter.

obvious that this structure permits of ready removal of the honing stones when desired. Each segment is provided at opposite ends with hooks 35 which are designed to retain coil springs 37 whose function is to yield ably hold the several segments upon the spiders l1 and 14.

In using this hone, the adjusting nut 25 is rotated to expand or permit contraction of At this point the locking nut 29 is turned to snugly engage the adjusting nut and gevent its backing up on the spindle 10. :1

further means for preventing a change in the adjustment of the segments and to simultaneously determine the point at which the segments must be adjusted to uniformly hone aset of cylinders I rotate the gage ring 21 u on the externally threaded sleeve 18 carrie by the expansion member. It is obvious that rotation of this gage ring will tend to force the two spiders toward one another and consequently tightly grip the honing segments between the fingers 13 and 15 upon which said segments are readily slidable. At this pointthe operator will observe the relation of the pointer and graduations of the gage and as a result will be able to uniformly hone a set of cylinders, eliminating the necessity for comparing the measurements of several cylinders being honed. It is apparent that this gage mechanism will efl'ectively serve as a locking de* vice as above stated and will provide a simple means for assuring proper honing of cylinders of automobile engines and the like.

Manifestly, the construction shown is capable of considerable modification and such modification as ma fall within the scope of my claims, I consider within the spirit of my invention.

I claim:

1. A honing tool com rising a spindle having one end screw t readed, a spider fixed to the other end of said spindle, radial fingers on the spider, a pair of spaced interconnectedexpansion cones slidable upon the spindle, a sleeve integrally formed with one of said cones and spaced from the spindle, a second finger carrying spider slidably arranged over said sleeve, honing segments radlally adjustable upon the spiders, a second sleeve having one end extending into the space between the spindle and the first sleeve, an ex ansion coil spring in said space, a nut t readed upon the s indie to move the second sleeve and slidab y adjust the cones, and means for locking the parts in any adjusted position.

2. A honing tool com rising a spindle having one end screw t readed, a spider fixed to the other end of said spindle, radial fingers on the spider, a pair of spaced interconnected expansion cones slidable upon the spindle, a sleeve integrally formed with one of said cones and spaced from the spindle, a second finger carrying spider slidably arranged over said sleeve, honing segments radially adjustable upon the spiders, a second sleeve having one end extending into the space between the spindle and the first sleeve, an expansion coil spring in said space, a nut threaded upon the spindle to:

move the second sleeve to slidahl adjust the cones, and a combined gage an locking ring threadedly mounted upon the first named sleeve and movable into engagement with the second named spider.

3. A honing tool comprising, a spindle, a spider at one end of the spindle having radiating fin ers, an expansion cone slidable on thespin le, a second finger carrying spider movable longitudinally over the spindle near its other end, stone holders, apertured bracket members carried by said holders and slidable radially on the spider fin ers, a member threaded on said other end 0 the spindle, and a coil expansion spring between 10 t e cone and said member.

In testimony whereof, I aflix my signature.

HENRY- STRAND. 

